Kuroneko -- ISDN actually stands for "Integrated Services Digital Network", a form of telephone network that sends all services (including voice calls) digitally. In actuality, ISDN is a royal pain to configure and use for Data thanks to the differing ISDN standards across the globe, the complexity of the ISDN bearer service and the fact that most hardware is designed to work in any country resulting in the operator having to know which standard the country they're in conforms to, and how to format the source and target phone numbers correctly.Re-expansions of existing acronymsComputers:Internet